基于FDA-MIMO雷达的主瓣SMSP干扰空时域联合抑制方法

doi:10.12305/j.issn.1001-506X.2022.07.11

摘要/Abstract

摘要：

主瓣干扰由于与真实目标位于同一个雷达波束宽度, 不仅会严重降低雷达对真实目标的检测与跟踪性能, 更难以在波束层面上受到抑制。来自主瓣的频谱弥散(smeared spectrum, SMSP)干扰可以在时频域对目标信号进行遮盖, 更可在空域上形成多个具有欺骗效果的假目标。针对此问题, 提出一种基于频控阵-多输入多输出雷达的空时域联合抑制方法, 利用盲源分离算法将目标与干扰分离在不同通道, 在获得目标距离信息后进行距离- 角度联合波束形成, 以提高输入信干噪比。该方法可以在不具有目标的距离先验信息条件下有效抑制主瓣SMSP干扰, 因此具有很好的适用性, 仿真实验验证了所提方法的有效性。

关键词: 主瓣频谱弥散干扰, 频控阵, 盲源分离, 距离-角度联合波束形成

Abstract:

The main-beam jamming is located in the same width as the target, which greatly reduces the detection and tracking performance of the radar. It is also difficult to suppress it at the beam level. The smeared spectrum (SMSP) jamming from the main beam can cover the target signal in the time and frequency domain and form multiple false targets with deception effect in the airspace. To solve this problem, a space-time joint suppression method is proposed based on frequency diverse array multiple-input and multiple-output radar, Firstly, the blind source separation algorithm is used to separate the target and the jamming in different channels. After obtaining the target range information, range-angle joint beamforming is carried out to improve the input signal to jamming and noise ratio. This method can effectively suppress the main-beam SMSP jamming without a prior range information of the target, which has good applicability. Simulation results show the effectiveness of the proposed method.

Key words: main-beam smeared spectrum (SMSP) jamming, frequency diverse array (FDA), blind source separation (BSS), range-angle joint beamforming

中图分类号:

TN958.5

赵英健, 田波, 王春阳, 宫健, 谭铭, 周长霖. 基于FDA-MIMO雷达的主瓣SMSP干扰空时域联合抑制方法[J]. 系统工程与电子技术, 2022, 44(7): 2157-2165.

Yingjian ZHAO, Bo TIAN, Chunyang WANG, Jian GONG, Ming TAN, Changlin ZHOU. Space-time joint suppression method of main-beam SMSP jamming based on FDA-MIMO radar[J]. Systems Engineering and Electronics, 2022, 44(7): 2157-2165.

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参数	数值	参数	数值
发射阵元数	12	脉冲宽度/μs	50
接收阵元数	12	目标角度/(°)	0
载频/GHz	3	信噪比/dB	10
频偏增量/kHz	3	干扰子脉冲数	5
带宽/MHz	5	干扰距离/km	101
发射阵元间距/m	0.05	干噪比/dB	30
接收阵元间距/m	0.05	干扰角度/(°)	0
调频斜率/(GHz·s^-1)	10	参考距离/km	100
目标距离/km	100	参考窗宽/μs	100

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